U.S. Army brigadier general uniform shoulderboard from September 1959 to October 2014.

Rank flag of a brigadier general in the United States Army. The flag of a brigadier general of the Army Medical Department has a maroon background; the flag of a chaplain (brigadier general) has a black background.

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The rank of brigadier general has existed in the U.S. military since the inception of the Continental Army in June 1775. To prevent mistakes in recognizing officers, a general order was issued on July 14, 1775, establishing that brigadier generals would wear a ribband, worn across the breast, between coat and waistcoat, pink in color.[1] Later, on June 18, 1780, it was prescribed that brigadier generals would instead wear a single silver star on each epaulette.[1] At first, brigadier generals were infantry officers who commanded a brigade; however, over the course of the 19th and 20th centuries, the responsibilities of the rank expanded significantly.

During the period from March 16, 1802, to January 11, 1812, the rank of major general was abolished and brigadier general became the highest rank in the U.S. Army. Foreseeing the need for an expanded general staff in case of war, which seemed imminent, Congress restored the rank of major general in January 1812.[2][3]

The first brigadier general in the U.S. Marine Corps was CommandantArchibald Henderson, brevetted to the rank of brigadier general in the 1830s for his service in the Second Seminole War.[citation needed] The first non-brevet brigadier general in the Marines was Commandant Jacob Zeilin who was promoted to the rank in 1874, but when he retired in 1876, colonel once again became the highest rank in the Marines until March 1899 when Commandant Charles Heywood was promoted. Ever since then the office of commandant has been held by a general officer, with the permanent rank of the commandant raised to major general in 1908, then to lieutenant general, then to general during World War II, which rank it has held ever since.[citation needed]

The insignia for a brigadier general is one silver star worn on the shoulder or collar, and has not changed since the creation of the rank two centuries ago. Since the Mexican-American War, however, the lower rank of colonel has been the normal rank appointed to command a brigade that is organic to a division (e.g., the 1st Brigade of the 94th Infantry Division, vice the 187th Infantry Brigade).

Today, an Army or Marine Corps "BG" or "BGen," respectively, typically serves as deputy commander to the commanding general of a division or division-sized units and assists in overseeing the planning and coordination of a mission. In an infantry brigade not organic to a division, a brigadier general serves as the unit's commander, while a colonel serves as deputy commander. An Air Force brigadier general typically commands a large wing. Additionally, one-star officers of all services may serve as high-level staff officers in large military organizations.

U.S. Code of law explicitly limits the total number of general officers who may be on active duty. The total of active duty general officers is capped at 230 for the Army, 208 for the Air Force, and 60 for the Marine Corps. The President or Secretary of Defense may increase the number of general slots in one branch, so long as they subtract an equal number from another.[4] Some of these slots are reserved by statute.

For promotion to the permanent grade of brigadier general, eligible officers are screened by a promotion board consisting of general officers from their branch of service.[5] This promotion board then generates a list of officers it recommends for promotion to general rank.[6] This list is then sent to the service secretary and the joint chiefs for review before it can be sent to the President, through the defense secretary, for consideration.[7] The President nominates officers to be promoted from this list with the advice of the Secretary of Defense, the service secretary, and if applicable, the service's chief of staff or commandant.[8] The President may nominate any eligible officer who is not on the recommended list if it serves in the interest of the nation, but this is uncommon.[9] The Senate must then confirm the nominee by a majority vote before the officer can be promoted. Once the nominee is confirmed, they are promoted to that rank once they assume or hold an office that requires or allows an officer of that rank. For positions of office reserved by statute, the President nominates an officer for appointment to fill that position. For all three uniformed services, because the grade of brigadier general is a permanent rank, the nominee may still be screened by an in-service promotion board. The rank does not expire when the officer vacates a one-star position. Tour length varies depending on the position, by statute, or when the officer receives a new assignment. The average tour length per one-star billet is two to four years.

Other than voluntary retirement, statute sets a number of mandates for retirement. All brigadier generals must retire after five years in grade or 30 years of service, whichever is later, unless selected or appointed for promotion, or reappointed to grade to serve longer.[10] Otherwise all general and flag officers must retire the month after their 64th birthday.[11] However, the Secretary of Defense can defer a general or flag officer's retirement until the officer's 66th birthday and the President can defer it until the officer's 68th birthday. Because there are a finite number of General officer positions, one officer must retire before another can be promoted. As a result, General and flag officers typically retire well in advance of the statutory age and service limits, so as not to impede the upward career mobility of their juniors.[12]

[1]No universal insignia for officer candidate rank; Navy candidate insignia shown[2]Unofficial 1945 proposal for General of the Armies insignia; John J. Pershing's GAS insignia: ; George Dewey's AN insignia: [3]Rank used for specific officers during World War II and Korea only, not permanent addition to rank structure[4]Grade is authorized by the U.S. Code for use but has not been created[5]Grade has never been created or authorized